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我队在某煤田钻探施工中，曾连续遇到四个大涌水钻孔，最大涌水量达15升/秒，最大水头压力达13个大气压。并且涌水层位多，交替分布于多层可采煤层中。为保护煤田，防止开采时发生冒水事故，必须用水泥封闭。涌水层位最厚达320米。开始，我们使用常规方法，利用水泵通过钻杆灌注水泥浆（加重晶石粉和速凝剂）。由于现有设备条件的限制，涌水速度是灌注速度的几倍。即使水泵达最大泵量，因涌水对水泥浆的不断稀释，不断涌出，水
During a drilling operation in a coalfield, our team had successively encountered four large gushing water holes with a maximum water inflow of 15 liters / second and a maximum head pressure of 13 atmospheres. And more water layer, alternately distributed in multiple layers of coal mining. In order to protect the coalfield and prevent the occurrence of water-taking accidents during mining, it must be closed with cement. The gully layer of the thickest up to 320 meters. In the beginning, we used a conventional method to pump the grout through the drill pipe (adding barite powder and quick-setting admixture) using a water pump. Due to the limitations of existing equipment, the rate of water gushing is several times faster than the filling rate. Even if the pump reaches the maximum pump volume, water will be continuously poured out due to continuous dilution of grout